The vendor management team has requested all project managers to provide proof to back up complaints on vendor resolution delays. Which of the following will provide this information?

A scope statement defines project boundaries and deliverables and contains no information about vendor performance or issue tracking.

A project plan outlines how the project will be executed but does not track the history of individual vendor complaints or resolution timelines.

Action items capture tasks to be completed but do not formally document the origin, history, or status of raised issues and vendor delays.

An issue log tracks each issue raised during the project - including the date opened, description, responsible party, and resolution status - providing a dated, documented history of vendor complaints and unresolved delays that serves as concrete proof for management escalations.